From 2dabdcb9e551a97ff9d2d67a344cc66ffbf7117a Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sat, 17 Mar 2012 04:22:54 -0700
Subject: [PATCH] Add a function to update the sound listener

---
 apps/openmw/mwsound/openal_output.cpp | 12 ++++++++++++
 apps/openmw/mwsound/openal_output.hpp |  2 ++
 apps/openmw/mwsound/sound_output.hpp  |  3 +++
 3 files changed, 17 insertions(+)

diff --git a/apps/openmw/mwsound/openal_output.cpp b/apps/openmw/mwsound/openal_output.cpp
index 246fce7e1..1a02dc258 100644
--- a/apps/openmw/mwsound/openal_output.cpp
+++ b/apps/openmw/mwsound/openal_output.cpp
@@ -243,6 +243,18 @@ Sound* OpenAL_Output::StreamSound(const std::string &fname, std::auto_ptr<Sound_
 }
 
 
+void OpenAL_Output::UpdateListener(float pos[3], float atdir[3], float updir[3])
+{
+    alListener3f(AL_POSITION, pos[0], pos[2], -pos[1]);
+    ALfloat orient[6] = {
+        atdir[0], atdir[2], -atdir[1],
+        updir[0], updir[2], -updir[1]
+    };
+    alListenerfv(AL_ORIENTATION, orient);
+    throwALerror();
+}
+
+
 OpenAL_Output::OpenAL_Output(SoundManager &mgr)
   : Sound_Output(mgr), Device(0), Context(0)
 {
diff --git a/apps/openmw/mwsound/openal_output.hpp b/apps/openmw/mwsound/openal_output.hpp
index b0cd469e5..6dd5a2c23 100644
--- a/apps/openmw/mwsound/openal_output.hpp
+++ b/apps/openmw/mwsound/openal_output.hpp
@@ -24,6 +24,8 @@ namespace MWSound
 
         virtual Sound *StreamSound(const std::string &fname, std::auto_ptr<Sound_Decoder> decoder);
 
+        virtual void UpdateListener(float pos[3], float atdir[3], float updir[3]);
+
         OpenAL_Output(SoundManager &mgr);
         virtual ~OpenAL_Output();
 
diff --git a/apps/openmw/mwsound/sound_output.hpp b/apps/openmw/mwsound/sound_output.hpp
index 16639de7b..a8a91cca1 100644
--- a/apps/openmw/mwsound/sound_output.hpp
+++ b/apps/openmw/mwsound/sound_output.hpp
@@ -19,6 +19,9 @@ namespace MWSound
 
         virtual Sound *StreamSound(const std::string &fname, std::auto_ptr<Sound_Decoder> decoder) = 0;
 
+        // FIXME: This should take an MWWorld::Ptr that represents the in-world camera
+        virtual void UpdateListener(float pos[3], float atdir[3], float updir[3]) = 0;
+
         Sound_Output(SoundManager &mgr) : mgr(mgr) { }
     public:
         virtual ~Sound_Output() { }